Mold



1m zz ,1926. 1,589,742

J. F. CASEY mow Filed July 29, 1925 Patented June 22, 1926.

PATENT. OFFICE. ,f l

JOI-IN F.' CASEY, 0F PORTLAND, lO'RllfiOlT.

'MOLD Application led July 29, 1925. Serial No. 46,903.

My invention relates to molds in general, and particularlytofmolds for producing concrete conduit such as is used for vundergroumfl wiring, the object being to provide a device whereby suchl conduit may be manufactured of concrete poured into suitable sand molds', and thus be produced very cheaply. Y

`I accomplish the above object by means of the construction illustrated in the accompanying drawing, which is a part of this application for Letters Patent, like characters of reference indicating like parts throughout the several views thereof, and in which:

Fig. 1 is a sectional elevation, in perspectiveof my mold after being rammed up.

. Fi g, 2 is a similar view of the same ready i 'for the pouring` of the `concrete thereinto.

Fig. 3 is a perspective view of the core supporting grid.

Fig. i is a perspective view of the core print' plate.

Fig. 5 is a perspective view of the pattern.

Fig. 6 is a perspective view of the core.

Fig. 7 is a perspective view of the product.

In general my device consists of the usual mold `box with top and bottom boards, a stripping plate surrounding a pattern fixed upon one of said boards and said pattern having core prints thereupon; a core print plate imbedded in the mold; cores adapted to set into said core print plate and to extend above said stripping plate when the mold is in position for the pouring of concrete thereinto; and a grid for supporting the projecting` ends of said cores. The mold box 8 may be of any convenient and suitable form, with flanges adapted to be dowelled to a bottom board 9, said bottom board being provided with a pattern 10 se cured thereto or made integral therewith, said pattern being shaped to the outer `form of the conduit to be manufactured. A stripping plate 11 is provided and disposed between said box and said bottom board, re-

ceiving the dowels that secure said box and said board together, and said strippin plate is provided with an orifice therein a apted to fit over the pattern 10. The edges of said orifice are beveled to coincide with the line of juncture of the pattern and the board 9 as shown in Figs. 1 and 2.

The pattern is provided with a plurality of core prints 12, there being as many such coro prints as there are channels in the conduit to be manufactured. A core print plate 13 is provided, and said plate has orifices 1/1 adapted to receive the core prints 12. lVhen the bottom board with its attached pattern is in place within the box 8 said core print plate 13 is placed upon the pattern 10 with the core prints 12 projecting through their respective `orifices 111, as shown in Fig. 1, and sand is then rammed into the box 8 around thepattern 10,k also as shown in Fig. 1. lVhen the mold is properly rammed up a top board 15 is placed thereupon, andthe entire mold is reversed into the position shown in Fig. 2,

The bottom board 9 is then removed, withdrawing .the pattern 10 therewith, and .the y core prints 12 ofthe pattern 10, andto pro.-`

ject through the orifices 14 in the corel print plate 18, as shown infFlg. 2.

The tops ,of the cores 16 are. just ylevel with the upperfsurfacey of the stripping plate l1 when the mold is in pouring position as shownk in Fig. 2, but a portion of each core projects above said stripping plate in the form of a pin 18, and a grid is provided to receive said pins 18 and thus to steady and support the cores 16. Said grid consists conveniently of a boXlike frame 19 provided with flanges adapted to register .with the flanges upon the mold box 8 and to be dowelled thereto, with the stripping plate 11 disposed between said mold box and said grid, as shown in Fig. 2. Within said frame 19 are cross members 20 disposed so as `to lie above the various cores 16, and having orifices 21 therein ,to receive the core pins 18. Said cross members are disposed .so as to allow concrete poured into the frame 19 to reach and enter the spaces around the cores 16, conveniently b being raised above the level of the top o the mold and the cores, as shown in Fi 2.

The conduit for which this device is designed to be used in manufacture is required to have holes 22 longitudinally disposed therethrough, and to provide for such holes I place rods 23 in the mold, said rods entering orifices 24 in the cross members 20 of the grid, and corresponding orifices 25 in the core print plate 13.

Whenthe concrete has been poured into of the poured form is slicked off sniootli'ly and even with -thetop of the-stripping plate ll.

My device may be made ofany size, and constructed of any materials deemed convenient and suitable for a device of this character, and While I have illustrated and described a form of construction. .and/ar.- rangement of parts found desirable in materializing-my invention7 I Wish `to include in .this application lall mechanical equivalents and substitutes that may fairly be considered to come vWithin thescope and purview of my invention as defined in the appended claims.

Having disclosedv my invention -so .that others mayA be enabled to construct' and to use the samefwhat I claim ias neiv,:and-de sire to secure by Letters Patent is:

l. In `a mold: a plurality `of cores; core prints upon said cores; vand a plate provided with Xorifices -to receive .said core prints, and adapted to be imbedded Within the mold.

2. In a moldza plurality of cores With oppositely projecting portions; a plate adapted to be'imbedded Withinthe mold and having orifices thereinto receivecertain ot said projecting core portions; and a` grid upon said mold provided With orifices -for receiving the corresponding core portions.

3.In a'mold: a boardgaipattern secured uponssaid board; corefprints upon said pat-` tern; and a plate provided `with orifices adapted to receive said core prints, said plate being imbedded Within the mold.

. .4. In a. mold: a plate imbedded in the mold; a grid upon said mold; and cores positioned by the coaction of said plate and said grid.

In a mold: .2a. plate imbedded in the mold; a grid upon said mold; cores positionedfby 'the Acoaction of said plate andsaid grid; andirods positi'onedby said plate and said-gridantldisposed between certain oi said cores.

6. lIn a mold: a-plate imbedded in the mold and adapted to receive projecting por tions of cores.

7. Means to position a core Within a mold,

comprising a member imbedded Withinthe mold and :a member disposed above the mold,.said Inembersbeing adapted to hold a vcore lpositioned therebetween.

8. Ina vmold: a plate .imbedded vWithin said inold .a box like frame.upon1-saidmold; cross vfm'embers Within said 'iframeg cores positioned Ivvithin said mold by certain of said cross members and 'Said plate; land rods ypositioned Within said mold Iby other o-isaid cross members and said plate.

In Witness whereof I claim the foregoing as myown I hereunto aflix myfsignature at Portland. county of Multnomah, State vci Oregon, this 29th day -of Ju'ly, .1924.

- JOHN F. CASEY. 

